List two political changes that occurred during Monroe's first term as president.

During James Monroe's first term as president (1817-1821), two notable political changes occurred:

1. The Era of Good Feelings - This period was characterized by a sense of national unity and political cooperation, marked by the decline of the Federalist Party, which effectively left Monroe's Democratic-Republican Party as the only major political party at the time. The term "Era of Good Feelings" is often associated with Monroe's presidency and symbolizes the reduced partisan strife and the general sense of national purpose and desire for unity following the War of 1812.

2. The Missouri Compromise - This was a major piece of legislation passed in 1820, during Monroe's first term, which had significant political ramifications. The compromise admitted Missouri to the Union as a slave state and Maine as a free state, maintaining the balance of power between slave and free states in the Senate. It also established the 36°30' parallel as the line for the prohibition of slavery for all remaining territories west of Missouri.